Torch head for oxyacetylene torches



` Dec.'7', 1926. A

M. F. scHwoRM TORCH HEAD FOR OXYAGETYLENE I-IORCHES F'iled Nov. 4.1922

v ma',

ff. F. Schl/)arm A attoznmfa ing, the head of tlie'torch containing the ll)atented iec. i925,v

Tonen. HEAD non oxrncn'rxnnnn monstres.

.Lippi-ligation filed iro-veintena, v1/922. serial 599,064.

This vinvention relates to .Oxy-acetylene vwelding torches and 'has for its objects to provide a torch of this character lin Awhich the oxygen and acetylene are conveyed separately to the head of the torch, the acetylene being passed directly` to the mixing chamber,l

while the oxygen is carriedaround thehead through a plurality oipassages surrounding the mixing chamber and the tip for the purpose of cooling the tip'and head and preheating the oxygen before the saine is admitted t the mixing chamber.

The above and other objects may be attained by` constructing the torch in -tlie manner illustrated in the accompanying drawfmixing chamber and theftip,A a chamber be-A ing formed in the lower end of the head surrounding the tip and communicatingjwith the oxygen inlet and througharplurality of passages with asimilar rchamber in xthe upper endy of the head, ,which communicates rwith the mixing chamber.

lreiferred embodiments of the invention are illustrated in the accompanying` drawing, in whichy Figure'l is a side elevation of a torch constructed in accordance with the invention; .l Fig; 2, an enlarged sectional view through the head of the torch; f

VF ig. 3, an enlarged section on theV line 3 3, Fig. 2; and

Figs. t, 5 and 6, views similar to-Fig. 2

or' slightly modilied forms' of the invention. Similar numerals of reference indicate corresponding parts throughput the drawing.

The handle ont' the torch is indicated at 1 and is connected with the oxygen and acetylene valves Zand 3 respectively, which communicate with suitable sources of supplyof the respective gases throughthe `tlexible'tubes Ll. The oxygenv valve 2 yis connected withk passage,v 'l2 Vin the head, which communicates with the mixer 13, which is 4located Vaxially within the head. v v

.A passage lt connects the chamber with an annular chamber inthe lower end oi the head surrounding the Vtip 16, ysaid an nular chamber' being connected to a similar' chamber l? surro undingthe upper portion of the mixer by means or a plurality of longitudinal passages 18v located around' the head and surrounding thetip 'and mixer.

Themixer 15 shown in'lli'g. 2, is provided with a plurality oi' Vdowmvardly inclined passages V19 coiriniiinicating with the acetylene passage 12 and terminating inthe single passage 20 which" is in alinement ywith ythe longitudinal passage 21 'of the tip. A plu- Y rality oi reduced passages 22, in the mixer, l

provide communication between the annular chamber 17 in the head andthe inclined passages 19of'the mixer.` l "jlhe `acetylene passes through the'tube 6 and directly into the mixer, while the oxygen passes from the tube 5 down -through the .y

passage 1li to the chamber 15 and-thence upward through the passages 18 to theV chamber 17, and then into'y the mixer, the

two gases being mixed together as ltheylpass through the Vmixer, the mixturev expanding in theexpansion chamber 23 and then being carried( through thel centra-l passage 21 of the tiptothe llame'. 'f

It will thus be seen that the oxygen `passi ing entirely around the. head through channels surrounding the tip Yand mixer,"will maintain .the mixture Aat a lowtemperature, Apreventing the A acetylene `from'A becoming over-heated and deco1nposing,.while atftlie sameA time, the oxygen is preheated as lit passes around thehead, thus reducing the Vliability of filling' the Vila-me withr cold oxygen, the heated oxygen producing a much 'hotter and better flame.

.v An adaptation of the invention to thel equal pressure type ofA torch illustrated- 1n Fig. fl, 1n which the oxygen*tubeisfcon-l nected with the headin the saine' manner as above described, both of `said parts being substantially the' same in construction as Vrshown in'Fig. 2. vThe acetylene enters the head through the tube 6a and passes through 'the inclined passage 19a vin 'the mixer 13a to the central passage 20,\`vhile the `oxygen passes around thehead, in the manner above described, to the chamber 17 and then .up-I

Ward through the inclined passage 22a o'li the miXer to the central passage 2Oil thereof`V and thence to the expansion chamber' 23, which communicates With the tip. Y

In Fig. 5, is shownv a modification of the invention which contemplates the use of a tip in which the gases are mixed. In this' term ot' the invention, the oxygen tube 5,

communicates With the inclined' ypassage 14 ogi'; the head 9,?, said4 passage communicating at; its lower end with the chamber a, Which communicates through the plurality of longitudinal passages 18a with the upper chamber. 17a, said chamber communicatingwith `the upperend' ot the tip 16u.

yin this case isk passed dovv'n' through the passage lb'to the` chamber V15, which surrof ndsVv the Vtip 1'6"' and thence upward ,Ith'roiigh the plurality of passages lSbto the chamberl 17h which communicates Vwith the injector nozzle 9A which extends into the 'cluding 'a heat enlarged chamber 25 to which the acetylene is admit-ted through the passage 12b.

The oxygen passing from the injector nozzle intoth'e tip will carry the acetylene into the central passage 2lb of the tip, the mixed gases expanding iii the enlarged portion 21C oli' said tip passage, and then being carriedthrough` the' restricted end portion oi said tip to the flame.

lt Willbe obvious that the invention is applicable to any usual toi-mot tip and mixer construction, and by preheating the oxygen before passing it into the mixing chamber, less` oxygen is required for the' flame and the ypossibility ot oxidizing the'inetal is reduced'to a' minimum.l lVitli this construction, a very soft and Well proportioned flaniie is produced, which isA easy tov handle and which produces soft and d'uctile Welds.

A torch ot' thecharacter described, inniiXing vcl'iaiiiber in' the head, a tip communicating with the mixiiiv` chamber, a chamber in the lower portionor Athe head encircling the tip, means ior ad# mitti'nc' 0X o"en Vto said lower chamber a CB 2D 7 chamber iii the upper portion of the lie-ad communicating with the mixingv chamber,

longitudiiial passages connecting said upperV and lower chambers', and means for ad mittingacetylene to the mixing chamber.

MELviLLE sentivomi,A 

